Issue With Encapsulated Silver Coin, Has It Been Opened?

I'm sorry if this is in the wrong spot, I saw an earlier post where an encapsulated coin had started to tone and it was posted here.

I'm new to collecting encapsulated coins from the RCM. I'm collecting a few series in memory of my Dad who also collected -

I won this auction for the 2011 Wild Rose Coin off ebay, the seller simply said it was stunning and showed photos of the encapsulated coin.

Yesterday I picked it up at the post office, carefully took it out of the clamshell case (not how I first tried in the vid with one hand) and right away had issues with the coin. (Other than the black sleeve missing) I decided to make a video, here it is:



I've been told one needs a flat end screwdriver or needs to twist to open a capsule? Has anyone done so before and would a lid just become loose in the mail?

You think it's a coincidence the little black spot looks like a 7?

Is that tarnish or toning?

The reason for my video and posting is that the seller says he is confused, that he just recently got this from the RCM and it should be in pristine shape, so I'm worried he will think I tampered with it.. though I think that tarnish or toning would take longer to appear than the less than a day I've had it.

Thank you!